ABSTRACT This paper presents the design and performance of a 94 GHz crossbar mixer using chip diodes in crossbar configuration. The mixer has been designed in suspended stripline configuration on 2 mil fused quartz substrate. Co-simulation between Agilent Advance Design System (ADS) and CST Microwave studio is used to simulate and optimize the mixer circuit. The conversion loss of this crossbar mixer with ~10 dBm of LO power over RF bandwidth (89 to 93.8 GHz) with LO frequency at 94 GHz has been measured. Measurement results show minimum conversion loss of the order of 8 dB and achieved LO to RF isolation was greater than 26 dB.
Cite this paper
Shah, S. and Gupta, G. (2015) Design of Crossbar Mixer at 94 GHz. Wireless Sensor Network, 7, 21-26. doi: 10.4236/wsn.2015.73003.
 Paul, J., Yuan, L. and Yen, P. (1982) Beam Lead Dielectric Crossbar Mixers from 60 to 140 GHz. 1982 IEEE MTT-S International Microwave Symposium Digest, Dallas, 15-17 June 1982, 372-373.
 Nguyen, C. and Chang, K. (1984) 140 GHz Broadband Crossbar Stripline Mixer with over 20 GHz Instantaneous RF Bandwidth. Electronics Letters, 20, 441.
 Bui, L.Q., Ton, N. and Ball, D. (1984) A D-Band Millimeter-Wave Crossbar Mixer. 1984 IEEE MTT-S International Microwave Symposium Digest, San Francisco, 30 May-1 June 1984, 555-556.
 Lioutas, N. and Fourikis, N. (1991) The Development of Simplified Crossbar Mixer Operating at Ka-Band. International Journal of Infrared and Millimeter Waves, 12, 845-855.
 Lehtovuori and Costa, L. (1998) Model for Shielded Suspended Substrate Microstrip Line. Circuit Theory Laboratory Report Series, No. CT-38, Espoo, 12 p.
 Maas, S.A. (1986) Microwave Mixers. Artech House, Boston.
 Tahim, R.S., Chan, J.C. and Dutt, B. (1983) Millimeter Wave Image Enhanced Mixer. 4th International Symposium on Recent Advances in Microwave Technology.
 Matthaei, G., Young, L. and Jones, E.M.T. (1980) Microwave Filters, Impedance Matching Networks, and Coupling Structures. Artech House, Boston.